<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-3.3.1.js"></script>
    <script>
$(f);

function f(){
    $("div[align][title='333333']").css("font-size","30px");
}
    </script>
</head>
<body>
 <div class="d1">1</div>
 <div align="right" title="22222">2</div>
 <div align="center" title="333333">3</div>
 <p class="p1">1</p>
 <p>2</p>
 <p>3</p>
 <h3>1</h3>
</body>
</html>